Answer
Z = -2 indicates the Z score is below the mean by 2 standard deviations
Therefore,
6 = 2 σ
σ =3
Work Step by Step
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Essentials of Statistics for the Behavioral Sciences 8th Edition
by Gravetter, Frederick J.; Wallnau, Larry B.
Published by
Cengage Learning
ISBN 10:
1133956572
ISBN 13:
978-1-13395-657-0
Chapter 5 - z-Scores: Location of Scores and Standardized Distributions - Problems - Page 146: 12
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